Grate



L. BUDD.

GRATE.

APPLICATION FILED JAN. 9, 1920.

lfl UQfiQQo Patented Dec. 20, 1921.

2 SHEETS-SHEET l- 4 4 K L. BUDD.

GR/QTE.

APPLICATION FILED mu. 9, 1920. 1 Patented DES-20,1921.

I 2 spins-smut 2 eaten receives.

Specification of Letters Patent.

Patented Dec. 2%, 1921.

Application filed January 9, 1920. Serial No. 350,363.

T 0 all whom it may concern.

Be it known that I, LEsTnR Bonn, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Grates, of which the following is a specification.

One object of my invention is to provide an improved shaking grate in which the grate bars are so constructed that when rocked to shake the ash from the fire, they will also operate to crush or grind any clinkers resting thereon so as to quickly free them from the fire and permit them to drop into the ash pit.

Another object is to so construct my improved grate that it will provide sufficient clearance space for the ashes and crushed clinkers and at the same time will permit air tofreely pass upwardly between the grate bars and thereby supply sufiicient air to produce complete combustion with the fuel.

Another object is to preferably so make my improved grate that no matter in what position the grate bars may be there is never enough space between them at the bottom to allow any obstacle to lodge between the bars and prevent their movement.

A further object is to make my improved grate of a. strong and durable construction and so that it can be easily rocked.

These objects, and other advantageous ends which will be described hereinafter. I attain in the following manner, reference being had to the accompanying drawings in which I Figure 1 is a fragmentary top plan view showing my improved grate,

Fig. 2 is a section taken on the line 22 of Fig. 1,

Fig. 3 is a view of similar character to Fig. 2 showing the grate rocked into its extreme operative position in one direction; illustrating how the same operates to start the crushing of clinkers,

Fig. 4c is a view of similar character to Fig. 3 showing the same having been rocked part way in the opposite direction and showing how the parts act to break the clinker-s,

Fig. 5 is a top plan view of one of the grate bars which forms a part of my invention,

Fig. 6 is a fragmentary edge view of said bar,

Fig. 7 is a fragmentary bottom plan view of the same,

Fig. 8 is an end view of the same, and

Fig. 9 is a fragmentary top plan view of the grate looking in the direction of the arrow 00 as shown in Fig. 3.

Referring to the drawings, my improved grate includes a number of grate bars 10 each having trunnions 11 at their opposite ends so that they can be rockably mounted in a frame 12. Each of the grate bars has a depending lug 13 and these lugs can be pivotally connected as at 14 to a shaking rod 15. This shaking rod can be moved backwardly and forwardly by any suitable means not illustrated. The grate bars 10 at opposite sides have fingers or projections 16 which are spaced apart, and between these fingers are other fingers 17; the lat ter being shorter or in other words not eX- tending outwardly as far as the fingers 16. The fingers 16 on one side of each bar are arranged directly opposite the fingers 17 on the opposite side of the bar, as clearly shown in Figs. 1 and 5. Furthermore, each of the fingers 16 and 17 tapers downwardly in two directions. In the first place they taper inwardly; the inwardly tapering surfaces 16 and 17 being clearly illustrated in Figs. 2, 3, 4: and 8. In the second place they taper in the direction of the length of the bars, as shown at 16 and 17 Thus between each two of the fingers 16 there is a space 18, in front of the interposed finger 17, which flares downwardly, as clearly shown in Figs. 5, 6 and 9. Further than this, the spaces 19 between adjacent fingers 16 and 17 also flare downwardly. The bottom surface of each of the bars is cut out at various places throughout thelength of the bar between the fingers 16 and 17, such cut-out portions providing channels 20 which extend transversely from the outer portions of the bars and communicate with the space 21 formed in the inside of the bar, as clearly shown in Figs. 2, 3, 4:, 6, 7 and 9.

The bars 10 are positioned parallel with each other so that the fingers 16 of one bar are directly in line with the fingers 17 of the adjacent bar. During the shaking operation of the grate, any clinkers. such for example as the clinkers illustrated at 22. which are supported by the grate bars, will slide and become wedged within the space 18 of the adjacent bar and when the bars are rocked in an opposite direction, such for example from the position shown in Figs. 3 and 9 to the position shown in Fig. a, the clinkers will become wedged within the spaces 18 and also pressed against the outer edge surfaces of the fingers 17. The fingers 16 of the bars upon which the clinkers are resting serve to lift the clinkers while within the spaces 18 and thereby crush the clinkers since these spaces 18 become narrower adj a cent their tops and the clinkers are thus crushed-between the side surfaces 16 At the same time there is a pressure exerted upon theclinkers between the adjacent surfaces 16 and 17 on adjacent bars and the clinkers are thus split transversely and fall downwardly through the spaces 18 and spaces 19. The cut-out channels 20 serve as means of escape laterally of the crushed clinkers and also assist in permitting air to enter upwardly between the bars while the grate is in its normal position.

In practical operation extremely large clinkers are quickly ground and freed from the grate of'my present invention and it will be noted that when the clinkers are initially too large to be entirely crushed with one rocking operation that they will alternately slide backwardly and forwardly over the top surface; each time comparatively large portions being chewed or ground therefrom by the action of the parts as above described.

lVhile I have described my invention as taking a particular form, it will be understood that the various parts of my invention may be changed without departing from the spirit thereof and hence I do not limit myself to the precise construction set forth, but consider that I am at liberty to make such changes and alterations as fairly come within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is l. A grate including bars rockably mounted side by side and having projections on their sides spaced apart, certain of the projections being longer than others with the long projections of one bar opposed to the short projections of the adjacent bar, said projections having their opposite side surfaces converging downward so that upwardly tapering channels are provided between the opposed side walls of adjacent long projections and comparatively narrow upwardly tapering channels are formed between the side walls of the short projections and adjacent side walls of the longer projections, said grate bars being so arranged that the long projections of one bar extend into the spaces between the long projections of adjacent bars; substantially as described.

2. A grate including bars rockably mounted side by side and having projections on their sides spaced apart, certain of the projections being longer than others with the long projections of one bar opposed to the short projections of the adjacent bar, said projections having their opposite side sur fares converging downward so that upwardly tapering channels are provided between the opposed side walls of adjacent long projections and comparatively narrow upwardly tapering channels are formed between the side walls of the short projections and adjacent side walls of the longer projections, said bars at portions between the side walls of adjacent long and short projections being cut away at positions below their tops to provide transverse openings leading from said second mentioned channels. said grate bars being so arranged that the long projections of one bar extend into the spaces between the long projections of adjacent bars; substantially as described.

3. Aograte including bars rockably mounted side by side and having projections on their sidesspaced apart certain of the projections being longer than others with the long projections of one bar opposed to the short projections of the adjacent bar, said projections having their opposite side surfares converging downward so that upwardly tapering channels are provided between the opposed side walls of adjacent long projections and comparatively narrow upwardly tapering channels are formed between the side walls of the short projections and adjacent side walls of the longer projections, said grate bars being so arranged that the long projections of one bar extend into the spaces between the long projections of adjacent bars, the ends of said projections being inclined downward and inward; substantially as described.

In testimony whereof I have signed my name to this specification in the presence'of two subscribing witnesses. i

LESTER BUDD: l Vitnesses: c

SARA T. HALL, MARY T. HEPBURN. 

